Zenith MicroPurity 0.2-micron filter cartridge for Residential HydroTap rated to 4,163 liters. Provides bacteriostatic effect, reduces Chlorine taste and odor, sediment, Cryptosporidium, Giardia, Lead and Limescale. This filter is independently tested and certified by NSF International to NSF/ANSI Standards 42 and 53 and is WaterMark approved for use in Australia and New Zealand.